The first designed children will not be much different from us. Most likely, their genes will be changed to get rid of deadly hereditary diseases. With the development of technology, more and more people begin to think that the non-use of genetic modification are unethical because it dooms children for suffering and death, which can be prevented. As soon as the first such child is born, the door will open, which will not be able to close. At first, no one will touch some features, but as the approval of the technology and our knowledge of the genetic code grows, the temptation will grow. If you make your offspring immune to Alzheimer's, why not give them an improved metabolism? Why pile up not to reward their excellent eyesight? What about height or muscle? Lush hair? What about the gift of exceptional intelligence for your child? Huge changes will come as a result of the accumulation of personal decisions of millions of people. It's a slippery slope, and modified humans can become the new norm. As genetic engineering becomes more and more familiar and our knowledge improves, we can tackle the main cause of death - SENESCENCE.
Whatever it is, what used to be science fiction will soon become our new reality. A reality full of opportunities and obstacles.
RE: Where should DNA modifications stop?